IMHO all of that will be replaced by renewables. Perhaps 20% to 25% of electricity will come from end-user solar, the other from larger projects such as wind farms and geothermal plants.

I see some big renewable business in the future.

And, at this point, it’s likely past the point where government can/will do much to slow the transition. Government could speed it up, but financial decisions will favor renewables and that’s likely where utilities will put their money as long as they have enough dispatchable gas to get them through the periods of low renewable input.

One of the desirable features of renewable power is that it will never become as big of a business as traditional fossil / nuclear generation. The downside is that incumbent fossil companies have more concentrated capital with which to influence politicians.
(This is not to say that RE won’t become very big business, just that for any given level of power generation renewable solutions will involve less concentration of resources, revenue, profit, environmental impact, people involved, etc)
One would like to think that the political constituency that has truth on its side will need to spend less to win an election than their opponents, but how much less?

The long-term solution is to reduce the influence of money in politics as much as possible.